Mariadb 10.3 dockerized with replication

MariaDB 10.3 dockerized with replication. Master/Slave setup in 30 seconds.

How to use

Docker run

@TODO

Docker compose

Example docker-compose.yml for mariadb replication:

version: '3'

services:
    db-master:
        image: caffeina/mariadb-replication
        restart: always
        volumes:
            - db-master-data:/var/lib/mysql:rw
        environment:
            MYSQL_DATABASE: "example"
            MYSQL_ROOT_PASSWORD: "mastersecret"

    db-slave:
        image: caffeina/mariadb-replication
        restart: always
        depends_on:
            - db-master
        volumes:
            - db-slave-data:/var/lib/mysql:rw
        environment:
            MYSQL_DATABASE: "example"
            MYSQL_ROOT_PASSWORD: "slavesecret"
            MYSQL_MASTER_HOST: "db-master"
            MYSQL_MASTER_PASSWORD: "mastersecret"

volumes:
    db-master-data:
    db-slave-data:

@TODO

$ docker-compose up

@TODO

$ docker-compose -f docker-compose.yml -f docker-compose.dev.yml up --build

Configuration

The mariadb-replication image is an extension of mariadb:10.3, you can use all the feature included in the original docker image. For more information look at mariadb documentation on docker hub.

Enviroment variables

@TODO Sets the connection parameters to the master. The MYSQL_MASTER_HOST variable is required.

MYSQL_MASTER_HOST: "db-master"
MYSQL_MASTER_PORT: 3306 # (Optional) Default: 3306
MYSQL_MASTER_USER: "root" # (Optional) Default: 'root'
MYSQL_MASTER_PASSWORD: "secret" # (Optional) Default: ''

@TODO The generated user and password will be printed to stdout.

MYSQL_GRANT_SLAVE_USER: "user" # (Optional) Default: *RANDOM STRING*
MYSQL_GRANT_SLAVE_PASSWORD: "secret" # (Optional) Default: *RANDOM STRING*

@TODO

SERVER_ID: 2 # (Optional) Default: *RANDOM INT*

@TODO

EXPIRE_LOGS_DAYS: 5 # (Optional) Default: '10'

@TODO

MAX_BINLOG_SIZE: "50M" # (Optional) Default: '100M'

Set slave-skip-errors option in mysql config file. Look at mysql documentation for more details.

MYSQL_SLAVE_SKIP_ERRORS: "all" # (Optional) Default: 'OFF'

Todo

• Improve documentation;
• Add innodb-read-only parameter (Service restart on first run is needed);
• Move /etc/mysql/conf.d/master-slave.cnf in other path (So the user can bind a volume to /etc/mysql/conf.d/ for custom configuration);
• Permit replication on existing database.

Contributing

How to get involved:

1. Star the project!
2. Answer questions that come through GitHub issues
3. Report a bug that you find

This project follows the GitFlow branching model. The master branch always reflects a production-ready state while the latest development is taking place in the develop branch.

Each time you want to work on a fix or a new feature, create a new branch based on the develop branch: git checkout -b BRANCH_NAME develop. Only pull requests to the develop branch will be merged.

Pull requests are highly appreciated.

Solve a problem. Features are great, but even better is cleaning-up and fixing issues in the code that you discover.

Versioning

This project is maintained by using the Semantic Versioning Specification (SemVer).

Copyright and license

Copyright 2017 Caffeina srl under the MIT license.